Unrelenting Force allows you to push back your opponents and stagger them. Its usefulness continues to persist even into the high levels.

Does light damage in addition to the pushback effect.

A fully-developed Unrelenting Force has enough pushback to throw enemies off cliffs and high places. Use this to your advantage when you find yourself atop mountaintops and accosted by a Frost Troll to blast them off the mountain.

Use Unrelenting Force on the large, glowing orb hanging above the Silent City in Blackreach to summon the named dragon Vulthuryol to attack you.